Braking system for printing presses and other machines



C. T. HENDERSON. BRAKING SYSTEM FOR PRINTING PRESSES AND OTHER MACHINES.

' APPLICAIION FILED AUG, I, 191]. 1,427,461.

Patented Aug. 29, 1922.

Pan:

' (mm '1'. HENDERSON, F YOIINGSTOWN, NEW YoEx, assronon- TO THI'CUTLER,-

' HAMMER MFG. on, or MILWAUKEE, WISCONSIN, A. o'onronaprion oE -w1s-.

consm.

nnaxme sYs'rEm Eon PRINTING rEEssEs AND OTHER. MAC INES.

Specification of Letters Patent. Bah-3 139d Aug, 29, 1922, Originalapplication filed July 3, 1 916, SerialNo. 107,298. Patent no.1,252,902, dated January 8, 1918.

Divided and this application filedAugust 1, 1917. Serial No. 183,837.

To a ll wh'om it may concern Be t known that I, CLARK T. HENDERSON, acitizen of the United States, residing at V Youngstown, in the county ofNiagara and 5 State of New York, have invented new and usefulImprovements in Brakin Systems for Printing Presses and Other Machines,of which the following is a full, clear, concise, and exactdescription," reference being had to the accompanying drawing, forming apart of this specification.

This invention relates-to. braking systems for printing presses andOther machines supplied with web or other material from rolls 16 and.relates more particularly to braking means. for such rolls. l In mycopending application, Serial No. 107,298, filed July 3, 1916, patentedJan. 8, 1918, No. 1,252,902, of-which the present 20 application is adivision, there is disclosed a braking system for'high speed printingpresses and other machines having a high 7 inertia which insures quickbut smooth stopping thereof and the present invention has among itsobjectsto' provide means which will brake the supply roll or rolls ofsuch a machine proportionally to the decrease in speed of the latter.

A further object is to provide roll braking means which may. be broughtinto action at ,any speed of the press'or other. machine without unduestrain on the material being fed from the roll to the machine. A Afurther object isto provide roll braking means including meansutilizable iforjtensioning of the material supplied from the roll duringower o erationof the machine.

-- Other ob ects an advantages of the in vention will hereinafterappear.

The accompanying drawing illustrates one embodiment ofthe. inventionwhich will now be described, it being understood that the invention issusceptible of various modifications without departing'from the scope 46of the appended claims. I I

In the drawing,

Figure 1 is a schematic view of a sextuple printing press provided withbraking meansv for both the press cylinders and the supply 50 rolls;and, W I

Fig 2 is a fragmentary diagrammatic view of a controller for the pressdrive and the braking means shown in Fig. 1.

Referring to Fig. 1, which is identical with the corresponding' figureof said copending application, the same shows six printing couplets 1 to6 inclusive arranged NT. emery vertically in pairs and 'each pairsupplied" with .a web from 'a roll W. The couplets are arranged in anoffset relation whereby thecylinders it of' the lower align verticallywith the cylinders b of the upper couplets and such cylinders aresubjected to a double motordrive M, includin and a large motor L. A so,one cylinder of each cduplet is subjected to the action of a? frictionbrake 8, each of said'brakes being arranged to act upon, two couplets.Each brake is of conventional mechanical coni struction and is providedwith springs 9 .to

a' small motor S efl'ect release thereof, and with a tor ue motor 10 forapplying the same. torque motors are, as shown in Fig. 2, and asdescribed in saidcopending application,

subjected to the 'current supplied by themotor L when driven as-agenerator by the press and serve to apply the brakes 8 with a I. varyingeffect approximately proportional to the kinetic energy of the press.

c Referring now to the web rolls W, each of" the same is supported'upontwo rollers '14 joint operation and the former having an adjustablebraking, device 17'; Thus as the roll is revolved in unwinding it willencounter a drag in thebraked roller, 14whereby the web withdrawntherefrom will be I placed under a tension which may bereguand 15suitably connected as by a belt 16 for ers when so driven feed the webate linear. 4

speed bearing a-defi'nite relation to the pei'ipheral speed ofthe.;.='pre ss cylinders and preferably a slightly greater speed,forexample, two per cent. Thus the drives for the rollers 14: and 15-may be established at any speed of the press without strain upon thewebs and said rollers when'so driven will maintain the predeterminedrelation between the linear speed of the web and the peripheral speed ofthe press cylinders.

Accordingly assuming that the cylinder braking means be brought intoaction at any given speed of the press, the roll braking means may besimultaneously brought into action by energization of the clutch 19,whereupon as the press slows down the web rolls will be correspondinglyslowed down thus insuring against waste of material and slowing up ofthe press. In this connection it may be mentioned that the brakingsystem disclosed is particularly advantageous for use in emergencies,such as upon web 7 diagrammatically the large motor L. and the smallmotor S, the torque motors 10 and the windings of clutches 19 and suchelements of the co'ntroller disclosed in said copending application asare essential to an understanding of the control of the braking means.More specifically, this figure shows electromagnetic main switches 20and 21 for the motors L and S respectively, said switches to becontrolled for operation of either motor and the former to bede-enerized upon web breakage. Switch 20 is of t e double throw type toalternatively connect the motor L to supply lines Z, Z or to establish adynamic braking circuit across the armature of said motor, said dynamicbraking circuit including the torque motors 10. Further,the switch 20 isprovided with an insulated auxiliary contact 22 adapted in the dynamicbraking position of said switch to bridge contacts 23 and 24 and thereby.connect the clutch windings 19 across the supply line ZZ.

Thus it will be seen that the braking motors and clutch windings will beconnected in circuit immediately upon disconnection of the motor L fromthe supply line and will be excluded from circuit upon line connectionof said motor whereby the control of both the cylinder brakes and theroll brakes will be entirely automatic.

What I claim as new and desire to secure by Letters Patent is:

1. In a braking system for a printing machine or the like supplied froma roll, in combination, braking means for the machine and control meansfor the supply roll to subject the latter to slow down with the machinein a given relation, said'control means including normally inactivemeans depend ent for action upon braking of said machine.

2. The combination with a driven machine supplied with material from aroll, of braking means for said machine and means to act' under theinfluence of said machine to subject the supply roll to slow down withsaid machine, the latter means including means rendering such actionthereof dependent upon braking of said maehine.

3. In a braking system iEor a printing machine having a plurality ofprinting couplets and a plurality of supply rolls therefor, incombination, a plurality of braking devices to brake different coupletsand means to establish a driving connection between each supply roll andthe couplet supplied thereby, said driving connections providing aperipheral speed of each roll equal to or greater than the peripheralspeed of the couplet to which it is delivering.

' 4. In a braking system for printing machines or the like supplied froma roll, in combination, braln'ng means for the machine, a rollerfrictionally engaging the supply roll of the machine and means toestablish a drive for said roller from a part of said machine during theperiod of braln'ng thereof to establish a peripheral speed of said rollbearing a definite relation to the speed of said machine and slightly inexcess thereof.

5e In a control system for a printing machine or the like supplied froma roll, in combination, electro-responsive braking means for themachine, electrically controlled and normally interrupted drivingconnections between the machine and its supply roll and common controlmeans for said braking means and said driving connections to effectestablishment of the latter when rendering the former efl'ective.

' 6. The combination with a machine supplied with material from a roll,of means to brake said machine and normally inactive means activeautomatically upon slow down of the machine to slow down the rollsubject to control by the speed of the machine.

7. The combination with a machine supplied with material from a roll,the unwinding operation of the roll vbeing dependent upon the pull ofthe material thereof by said machine, of means to brake said ma chineand means responsive to slow down of the machine to effect substantiallyproportional slow down of the roll.

8. The combination with a machine to be supplied with material from aroll, of a supporting roller for the supply 'roll and means to establisha drive between said machine and said roller for slowing down the rollwith said machine.

9. The combination with a machine to be supplied with material from aroll, of a.

' supporting roller for the supply roll and means to establish a drivebetween said machine and said roller for slowing. down the roll withsaid machine, said roller being 0perable by said machine at a peripheralspeed equal to, or greater than the speed of said machine;

10. The combination with a machine supplied with material from a roll,the unwinding operation of'the roll being dependent upon pull of thematerial thereof by said machine, of means to brake said machine andmeans to establish a drive between said'machine and its roll during slowdown of the former for effecting substantially proportional slow down ofthe latter.

11. The combination with a machine to be suppliedwith material from aroll, of

means to brake the roll during unwinding 12. The combination with aprinting mav chine having a plurality of printing couplets to besupplied with material'from separate rolls, of individual braking meansfor said couplets for applying to each a braking force proportional tothe speed thereof and individual control means for the supply rolls ofsuch couplets for rendering the speed of each roll substantiallyproportional to the speed of its respective couplet during braking ofthe latter.

In witness whereof, I have hereunto subscribed my name.

CLARK T. HENDERSON.

